Genetic Variant NM_000223.4:c.1229T>G (chr17-40863210-A-C) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBS1BS2

The NM_000223.4(KRT12):c.1229T>G(p.Val410Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000201 in 1,614,054 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.00032 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00019 ( 1 hom. )

Consequence

KRT12
NM_000223.4 missense

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.160

Publications

3 publications found

Variant links:

Genes affected

KRT12 (HGNC:6414): (keratin 12) KRT12 encodes the type I intermediate filament chain keratin 12, expressed in corneal epithelia. Mutations in this gene lead to Meesmann corneal dystrophy. [provided by RefSeq, Jul 2008]

KRT12 Gene-Disease associations (from GenCC):

corneal dystrophy, Meesmann, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
Meesmann corneal dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

KRT12 links:

ENSG00000265359 (HGNC:):

ENSG00000265359 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.004383743).

BP6

Variant 17-40863210-A-C is Benign according to our data. Variant chr17-40863210-A-C is described in ClinVar as [Benign]. Clinvar id is 2716869.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000322 (49/152356) while in subpopulation EAS AF = 0.0056 (29/5180). AF 95% confidence interval is 0.004. There are 0 homozygotes in GnomAd4. There are 32 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 49 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRT12	NM_000223.4 link	c.1229T>G	p.Val410Gly	missense_variant	Exon 6 of 8	ENST00000251643.5	NP_000214.1	Q99456
LOC105371777	XR_934754.3 link	n.63+12350A>C		intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRT12	ENST00000251643.5 link	c.1229T>G	p.Val410Gly	missense_variant	Exon 6 of 8	1	NM_000223.4	ENSP00000251643.4		Q99456

Frequencies

GnomAD3 genomes

AF:

0.000322

AC:

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00559

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00151

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000530

AC:

132

AN:

249266

AF XY:

0.000547

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00534

Gnomad FIN exome

AF:

0.00116

Gnomad NFE exome

AF:

0.0000445

Gnomad OTH exome

AF:

0.000491

GnomAD4 exome

AF:

0.000188

AC:

275

AN:

1461698

Hom.:

Cov.:

AF XY:

0.000204

AC XY:

148

AN XY:

727156

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00408

AC:

162

AN:

39698

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00137

AC:

AN:

53246

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000243

AC:

AN:

1112010

Other (OTH)

AF:

0.000182

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

115

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000322

AC:

AN:

152356

Hom.:

Cov.:

AF XY:

0.000429

AC XY:

AN XY:

74510

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41586

American (AMR)

AF:

0.00

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00560

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00151

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000305

Hom.:

Bravo

AF:

0.000246

ExAC

AF:

0.000585

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Dec 28, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.064

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.29

CADD

Benign

(source)

DANN

Benign

0.64

DEOGEN2

Benign

0.37

T;T

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.10

.;T

M_CAP

Benign

0.046

MetaRNN

Benign

0.0044

T;T

MetaSVM

Benign

-0.72

MutationAssessor

Benign

0.63

N;N

PhyloP100

-0.16

PrimateAI

Benign

0.25

PROVEAN

Benign

-0.73

.;N

REVEL

Benign

0.27

Sift

Benign

0.35

.;T

Sift4G

Benign

0.35

.;T

Polyphen

0.0050

B;B

Vest4

0.15

MVP

0.72

MPC

1.2

ClinPred

0.0069

GERP RS

0.71

Varity_R

0.077

gMVP

0.90

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_000223.4:c.1229T>G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over